The heater was in a bit of a sorry state with a matrix full of sludge, a wobbly fan and, as you can see, a fair bit of rust.
I stripped the unit down and first gave the matrix a good flushing out. I then gave the metal unit a quick rub down to get the rust off but left most of the old paint on and threw on a liberal coat of zinc-primer.
Followed by several coats of BMW Black paint.
The fan has been fettled back into a straight position and the spindle oiled so it spins much better now and works great off a 12V battery test. I threw a quick coat of zinc-primer onto the fan-drum before refitting it.
Reassembled, the unit looks a million times better and is ready to go back in place when we've finished painting the bulkhead in which it sits. The old nuts and bolts still look a bit rusty, but they've had a nice thick coat of Wax-Oyl.
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